The engine looks too bulky with that structure on it. Two plain engines instead of one might look better, vertically aligned I suppose. The two curves before the engine look like if they were cloned, as well as the front shells or hangars and the bridge. Fallen's version of the meat-in-the-sandwich structure reminds me of 18th century ships of the line, although the cloning is still a problem.
I like the added stern bridge and the middle "wheel". The middle hardpoints might need some smoothing or something else, they look too edgy. Maybe just hollow, like cardboard boxes.